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* [PATCH] powerpc: Add missing icache flushes for hugepagesDavid Gibson2005-12-09
| | | | | | | | | | | | | | | | | | On most powerpc CPUs, the dcache and icache are not coherent so between writing and executing a page, the caches must be flushed. Userspace programs assume pages given to them by the kernel are icache clean, so we must do this flush between the kernel clearing a page and it being mapped into userspace for execute. We were not doing this for hugepages, this patch corrects the situation. We use the same lazy mechanism as we use for normal pages, delaying the flush until userspace actually attempts to execute from the page in question. Tested on G5. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: More hugepage boundary case fixesDavid Gibson2005-11-25
| | | | | | | | | | | | | | | | | | | | | Blah. The patch [0] I recently sent fixing errors with in_hugepage_area() and prepare_hugepage_range() for powerpc itself has an off-by-one bug. Furthermore, the related functions touches_hugepage_*_range() and within_hugepage_*_range() are also buggy. Some of the bugs, like those addressed in [0] originated with commit 7d24f0b8a53261709938ffabe3e00f88f6498df9 where we tweaked the semantics of where hugepages are allowed. Other bugs have been there essentially forever, and are due to the undefined behaviour of '<<' with shift counts greater than the type width (LOW_ESID_MASK could return non-zero for high ranges with the right congruences). The good news is that I now have a testsuite which should pick up things like this if they creep in again. [0] "powerpc-fix-for-hugepage-areas-straddling-4gb-boundary" Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge ../linux-2.6Paul Mackerras2005-11-25
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| * [PATCH] powerpc: fix for hugepage areas straddling 4GB boundaryDavid Gibson2005-11-23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 7d24f0b8a53261709938ffabe3e00f88f6498df9 fixed bugs in the ppc64 SLB miss handler with respect to hugepage handling, and in the process tweaked the semantics of the hugepage address masks in mm_context_t. Unfortunately, it left out a couple of necessary changes to go with that change. First, the in_hugepage_area() macro was not updated to match, second prepare_hugepage_range() was not updated to correctly handle hugepages regions which straddled the 4GB point. The latter appears only to cause process-hangs when attempting to map such a region, but the former can cause oopses if a get_user_pages() is triggered at the wrong point. This patch addresses both bugs. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | [PATCH] powerpc: update my email addressOlof Johansson2005-11-23
|/ | | | | | | | Email address update, changing old work address to personal (permanent) one. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Merge spinlock.hPaul Mackerras2005-11-19
| | | | | | | | | The result is mostly similar to the original ppc64 version but with some adaptations for 32-bit compilation. include/asm-ppc64 is now empty! Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Merge pci.hPaul Mackerras2005-11-19
| | | | | | | | | | This involves some minor changes: a few unused functions that the ppc32 pci.c provides are no longer declared here or exported; pcibios_assign_all_busses now just refers to the pci_assign_all_buses variable on both 32-bit and 64-bit; pcibios_scan_all_fns is now just 0 instead of a function that always returns 0 on 64-bit. Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Trivially merge several headers from asm-ppc64 to asm-powerpcPaul Mackerras2005-11-19
| | | | | | | | | | | | | | | | For these, I have just done the lame-o merge where the file ends up looking like: #ifndef CONFIG_PPC64 #include <asm-ppc/foo.h> #else ... contents from asm-ppc64/foo.h #endif so nothing has changed, really, except that we reduce include/asm-ppc64 a bit more. Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge branch 'mymerge' of ssh://ozlabs.org/home/sfr/kernel-sfrPaul Mackerras2005-11-18
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| * powerpc: merge dma-mapping.hStephen Rothwell2005-11-18
| | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* | [PATCH] ppc64 need HPAGE_SHIFT when huge pages disabledAndy Whitcroft2005-11-18
|/ | | | | | | | | | | | | | | | | With the new powerpc architecture we don't seem to be able to disable huge pages anymore. mm/built-in.o(.toc1+0xae0): undefined reference to `HPAGE_SHIFT' make: *** [.tmp_vmlinux1] Error 1 We seem to need to define HPAGE_SHIFT to something when HUGETLB_PAGE isn't defined. This patch defines it to PAGE_SHIFT when we have no support. Signed-off-by: Andy Whitcroft <apw@shadowen.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: merge align.cBenjamin Herrenschmidt2005-11-17
| | | | | | | | | | | | | | This patch merges align.c, the result isn't quite what was in ppc64 nor what was in ppc32 :) It should implement all the functionalities of both though. Kumar, since you played with that in the past, I suppose you have some test cases for verifying that it works properly before I dig out the 601 machine ? :) Since it's likely that I won't be able to test all scenario, code inspection is much welcome. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Fix delay functions for 601 processorsPaul Mackerras2005-11-17
| | | | | | | | | | | My earlier merge of delay.h introduced a timebase-based udelay for 32-bit machines but also broke the 601, which doesn't have the timebase register. This fixes it by using the 601's RTC register on the 601, and also moves __delay() and udelay() to be out-of-line in arch/powerpc/kernel/time.c. These functions aren't really performance critical, after all. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fix typo in topology.hMichael Ellerman2005-11-17
| | | | | | | | | The fix to topology.h (5cfccd7f132432dd4705444a44b51d12ef88a85f) seems to have a typeo, struct sched_domain has an idle_idx member but not an idle_id member. I assume this is the fix. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] Avoid use of uninitialised spinlock in EEH.David Woodhouse2005-11-17
| | | | | | | | | | If the kernel supports both G5 and pSeries, and CONFIG_EEH is enabled, eeh_init() is (quite reasonably) never called when we boot on a G5. Yet eeh_check_failure() still gets called. We should avoid doing that if !eeh_subsystem_enabled. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Fix database regression due to scheduler changesNick Piggin2005-11-17
| | | | | | | | | | | | | | | PowerPC's NUMA domain doesn't currently set up some of the newer sched-domains parameters. Brian Twichell <tbrian@us.ibm.com> discovered and diagnosed a 1.5% OLTP database regression on a 4 core POWER5 system that was due to the use of NUMA scheduling on ppc64. This patch applies some saneish values to the parameters, in line with other architectures. This solves the regression. Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Make the vDSO functions set error code (#2)Benjamin Herrenschmidt2005-11-15
| | | | | | | | | | | | | | | The vDSO functions should have the same calling convention as a syscall. Unfortunately, they currently don't set the cr0.so bit which is used to indicate an error. This patch makes them clear this bit unconditionally since all functions currently succeed. The syscall fallback done by some of them will eventually override this if the syscall fails. This also changes the symbol version of all vdso exports to make sure glibc can differenciate between old and fixed calls for existing ones like __kernel_gettimeofday. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: pci_64 fixes & cleanupsBenjamin Herrenschmidt2005-11-15
| | | | | | | | | | | | | | | | I discovered that in some cases (PowerMac for example) we wouldn't properly map the PCI IO space on recent kernels. In addition, the code for initializing PCI host bridges was scattered all over the place with some duplication between platforms. This patch fixes the problem and does a small cleanup by creating a pcibios_alloc_controller() in pci_64.c that is similar to the one in pci_32.c (just takes an additional device node argument) that takes care of all the grunt allocation and initialisation work. It should work for both boot time and dynamically allocated PHBs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Remove an extraneous and incorrect declaration of pmac_nvram_init.Paul Mackerras2005-11-14
| | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Fix 32-bit compile: PPC_MEMSTART was undeclaredPaul Mackerras2005-11-14
| | | | | | | This defines PPC_MEMSTART as 0 because it is still used in a couple of places in the 32-bit code. Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Move a bunch of ppc64 headers to include/asm-powerpcPaul Mackerras2005-11-14
| | | | | | | ... and also delete some that are no longer used because we already had an include/asm-powerpc version of the header. Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: vdso fixes (take #2)Benjamin Herrenschmidt2005-11-14
| | | | | | | | | | | | This fixes various errors in the new functions added in the vDSO's, I've now verified all functions on both 32 and 64 bits vDSOs. It also fix a sign extension bug getting the initial time of day at boot that could cause the monotonic clock value to be completely on bogus for 64 bits applications (with either the vDSO or the syscall) on powermacs. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Export htab start/end via device treeMichael Ellerman2005-11-14
| | | | | | | | | | | The userspace kexec-tools need to know the location of the htab on non-lpar machines, as well as the end of the kernel. Export via the device tree. NB. This patch has been updated to use "linux,x" property names. You may need to update your kexec-tools to match. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Turn cpu_irq_down into kexec_cpu_downMichael Ellerman2005-11-14
| | | | | | | | | | | | | | | | | | | We currently have a ppc_md member called cpu_irq_down, which disables IRQs for the cpu in question. The only caller of cpu_irq_down is the kexec code. On pSeries we need to do more than just teardown IRQs at kexec time, so rename the ppc_md member to kexec_cpu_down and expand it. The pSeries code needs to know, and other platforms might too, whether we're doing a crash shutdown (ie. panicking) or a regular kexec, so add a flag for that. The pSeries implementation of kexec_cpu_down does an unregister VPA call, which tells the Hypervisor to stop writing stuff into our pacas. Without this we can get weird memory corruption bugs when we kexec, caused by the Hypervisor writing into the first kernel's pacas which happens to be somewhere interesting in the second kernel's memory. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Merge page.hMichael Ellerman2005-11-14
| | | | | | | | | | | | | Merge asm-ppc/page.h and asm-ppc64/page.h into asm-powerpc/page.h, asm-powerpc/page_32.h and asm-powerpc/page_64.h Built for PPC (common_defconfig), with ARCH=powerpc, mostly built with ARCH=ppc (other things break the build). Built and booted on P5 LPAR for PPC64 with ARCH=ppc/powerpc (pseries_defconfig). Mostly built for iSeries powerpc. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] atomic: inc_not_zeroNick Piggin2005-11-13
| | | | | | | | | | | Introduce an atomic_inc_not_zero operation. Make this a special case of atomic_add_unless because lockless pagecache actually wants atomic_inc_not_negativeone due to its offset refcount. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] atomic: cmpxchgNick Piggin2005-11-13
| | | | | | | | | Introduce an atomic_cmpxchg operation. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] powerpc: Merge vdso's and add vdso support to 32 bits kernelBenjamin Herrenschmidt2005-11-11
| | | | | | | | | | | | | | | | | | | | | This patch moves the vdso's to arch/powerpc, adds support for the 32 bits vdso to the 32 bits kernel, rename systemcfg (finally !), and adds some new (still untested) routines to both vdso's: clock_gettime() with support for CLOCK_REALTIME and CLOCK_MONOTONIC, clock_getres() (same clocks) and get_tbfreq() for glibc to retreive the timebase frequency. Tom,Steve: The implementation of get_tbfreq() I've done for 32 bits returns a long long (r3, r4) not a long. This is such that if we ever add support for >4Ghz timebases on ppc32, the userland interface won't have to change. I have tested gettimeofday() using some glibc patches in both ppc32 and ppc64 kernels using 32 bits userland (I haven't had a chance to test a 64 bits userland yet, but the implementation didn't change and was tested earlier). I haven't tested yet the new functions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Move udbg code to arch/powerpcDavid Gibson2005-11-11
| | | | | | | | | | | | | | | | | Since the udbg code in ppc64 has no ppc32 equivalent, move it straight over into arch/powerpc (and include/asm-powerpc for udbg.h). In time, we probably want to meld the various bits and pieces of 32-bit early debugging code into udbg, but for now only include it on CONFIG_PPC64=y builds. The only change during the move is to standardise the protecting #ifdef/#define in udbg.h, and move its banner comment above the initial #ifdef (which seems to be normal practice). Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64). Built for 32bit multiplatform (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: Increase sparsemem defaultsAnton Blanchard2005-11-11
| | | | | | | | | The definitions in sparsemem.h arent sufficient. We currently sell machines with 2TB of RAM, and in order to give us room for a few years growth lets set it to 16TB. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: Convert NUMA to sparsemem (3)Anton Blanchard2005-11-11
| | | | | | | | | | | | | | | | Convert to sparsemem and remove all the discontigmem code in the process. This has a few advantages: - The old numa_memory_lookup_table can go away - All the arch specific discontigmem magic can go away We also remove the triple pass of memory properties and instead create a list of per node extents that we iterate through. A final cleanup would be to change our lmb code to store extents per node, then we can reuse that information in the numa code. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: prep for NUMA sparsemem rework 2Anton Blanchard2005-11-11
| | | | | | | | Remove ppc64 specific version of nr_cpus_node and use the generic one provided. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc32: fix PQ2 PCI DMA interrupt handlingKumar Gala2005-11-11
| | | | | | | | | The bit position in the status register corresponding to the PCI DMA interrupt was incorrect. Additionally, we did not have a define for the PCI DMA interrupt. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] ppc64: mark failed devicesLinas Vepstas2005-11-10
| | | | | | | | | | | | 17-eeh-slot-marking-bug.patch A device that experiences a PCI outage may be just one deivce out of many that was affected. In order to avoid repeated reports of a failure, the entire tree of affected devices should be marked as failed. This patch marks up the entire tree. Signed-off-by: Linas Vepstas <linas@linas.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge git://oak/home/sfr/kernels/iseries/workPaul Mackerras2005-11-09
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| * powerpc: implement atomic64_t on ppc64Stephen Rothwell2005-11-09
| | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* | powerpc: Move some extern declarations from C code into headersPaul Mackerras2005-11-09
| | | | | | | | | | | | | | This also make klimit have the same type on 32-bit as on 64-bit, namely unsigned long, and defines and initializes it in one place. Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] powerpc: Move more ppc64 files with no ppc32 equivalent to powerpcDavid Gibson2005-11-09
|/ | | | | | | | | | | | | | | | | | | | | | | This patch moves a bunch more files from arch/ppc64 and include/asm-ppc64 which have no equivalents in ppc32 code into arch/powerpc and include/asm-powerpc. The file affected are: hvcall.h proc_ppc64.c sysfs.c lparcfg.c rtas_pci.c The only changes apart from the move and corresponding Makefile changes are: - #ifndef/#define in includes updated to _ASM_POWERPC_ form - trailing whitespace removed - comments giving full paths removed Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64), built for 32-bit powermac (ARCH=powerpc). Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Add user CPU features for POWER4, POWER5, POWER5+ and Cell.Paul Mackerras2005-11-09
| | | | | | | | This is at the request of the glibc folks, who want to use these bits to select libraries optimized for the microarchitecture and new instructions in these processors. Signed-off-by: Paul Mackerras <paulus@samba.org>
* powerpc: Fix typo introduced in merging platform codesPaul Mackerras2005-11-09
| | | | Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: merge code values for identifying platformsPaul Mackerras2005-11-09
| | | | | | | | | | | | This patch merges platform codes. systemcfg->platform is no longer used, systemcfg use in general is deprecated as much as possible (and renamed _systemcfg before it gets completely moved elsewhere in a future patch), _machine is now used on ppc64 along as ppc32. Platform codes aren't gone yet but we are getting a step closer. A bunch of asm code in head[_64].S is also turned into C code. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Consolidate asm compatibility macrosDavid Gibson2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | This patch consolidates macros used to generate assembly for compatibility across different CPUs or configs. A new header, asm-powerpc/asm-compat.h contains the main compatibility macros. It uses some preprocessor magic to make the macros suitable both for use in .S files, and in inline asm in .c files. Headers (bitops.h, uaccess.h, atomic.h, bug.h) which had their own such compatibility macros are changed to use asm-compat.h. ppc_asm.h is now for use in .S files *only*, and a #error enforces that. As such, we're a lot more careless about namespace pollution here than in asm-compat.h. While we're at it, this patch adds a call to the PPC405_ERR77 macro in futex.h which should have had it already, but didn't. Built and booted on pSeries, Maple and iSeries (ARCH=powerpc). Built for 32-bit powermac (ARCH=powerpc) and Walnut (ARCH=ppc). Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* [PATCH] powerpc: Merge cacheflush.h and cache.hDavid Gibson2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ppc32 and ppc64 versions of cacheflush.h were almost identical. The two versions of cache.h are fairly similar, except for a bunch of register definitions in the ppc32 version which probably belong better elsewhere. This patch, therefore, merges both headers. Notable points: - there are several functions in cacheflush.h which exist only on ppc32 or only on ppc64. These are handled by #ifdef for now, but these should probably be consolidated, along with the actual code behind them later. - Confusingly, both ppc32 and ppc64 have a flush_dcache_range(), but they're subtly different: it uses dcbf on ppc32 and dcbst on ppc64, ppc64 has a flush_inval_dcache_range() which uses dcbf. These too should be merged and consolidated later. - Also flush_dcache_range() was defined in cacheflush.h on ppc64, and in cache.h on ppc32. In the merged version it's in cacheflush.h - On ppc32 flush_icache_range() is a normal function from misc.S. On ppc64, it was wrapper, testing a feature bit before calling __flush_icache_range() which does the actual flush. This patch takes the ppc64 approach, which amounts to no change on ppc32, since CPU_FTR_COHERENT_ICACHE will never be set there, but does mean renaming flush_icache_range() to __flush_icache_range() in arch/ppc/kernel/misc.S and arch/powerpc/kernel/misc_32.S - The PReP register info from asm-ppc/cache.h has moved to arch/ppc/platforms/prep_setup.c - The 8xx register info from asm-ppc/cache.h has moved to a new asm-powerpc/reg_8xx.h, included from reg.h - flush_dcache_all() was defined on ppc32 (only), but was never called (although it was exported). Thus this patch removes it from cacheflush.h and from ARCH=powerpc (misc_32.S) entirely. It's left in ARCH=ppc for now, with the prototype moved to ppc_ksyms.c. Built for Walnut (ARCH=ppc), 32-bit multiplatform (pmac, CHRP and PReP ARCH=ppc, pmac and CHRP ARCH=powerpc). Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64). Built for 32-bit powermac (ARCH=ppc and ARCH=powerpc). Built and booted on POWER5 LPAR (ARCH=powerpc and ARCH=ppc64). Built and booted on G5 (ARCH=powerpc) Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
* Merge git://oak/home/sfr/kernels/iseries/workPaul Mackerras2005-11-09
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| * powerpc: merge irq.cStephen Rothwell2005-11-09
| | | | | | | | Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
| * ppc64: remove ppc_irq_dispatch_handlerStephen Rothwell2005-11-09
| | | | | | | | | | | | | | Use __do_IRQ instead. The only difference is that every controller is now assumed to have an end() routine (only xics_8259 did not). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
| * ppc64: move stack switching up in interrupt processingStephen Rothwell2005-11-08
| | | | | | | | | | | | | | This will make the ppc64 multiplatform irq handling more like the generic handling. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
* | [PATCH] ppc64: Save & restore of PCI device BARSLinas Vepstas2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 14-eeh-device-bar-save.patch After a PCI device has been resest, the device BAR's and other config space info must be restored to the same state as they were in when the firmware first handed us this device. This will allow the PCI device driver, when restarted, to correctly recognize and set up the device. Tis patch saves the device config space as early as reasonable after the firmware has handed over the device. Te state resore funcion is inteded for use by the EEH recovery routines. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: PCI reset support routinesLinas Vepstas2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | 13-eeh-recovery-support-routines.patch EEH Recovery support routines This patch adds routines required to help drive the recovery of EEH-frozen slots. The main function is to drive the PCI #RST signal line high for a qurter of a second, and then allow for a second & a half of settle time. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
* | [PATCH] ppc64: PCI error event dispatcherLinas Vepstas2005-11-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 12-eeh-event-dispatcher.patch ppc64: EEH Recovery dispatcher thread This patch adds a mechanism to create recovery threads when an EEH event is received. Since an EEH freeze state may be detected within an interrupt context, we need to get out of the interrupt context before starting recovery. This dispatcher does this in two steps: first, it uses a workqueue to get out, and then lanuches a kernel thread, so that the recovery routine can sleep for exteded periods without upseting the keventd. A kernel thread is created with each EEH event, rather than having one long-running daemon started at boot time. This is because it is anticipated that EEH events will be very rare (very very rare, ideally) and so its pointless to cluter the process tables with a daemon that will almost never run. Signed-off-by: Linas Vepstas <linas@austin.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
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